/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/HeadMountedDisplayFunctionLibrary.h
Cross XR-System query that returns critical information about the HMD display (position, orientation, device name)
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Input|XRTracking") static void GetHMDData ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContext, [FXRHMDData](API\Runtime\HeadMountedDisplay\FXRHMDData) & HMDData )